I have an extremely ordinary name. A Sarah, Emma, Lucy sort of name. I have always hated having to go by my name + surname initial (Sarah B, Emma C). I can't phone anyone and say "Hello, it's Lucy here" because there's a silence while they flip through the 7 Lucys it might be. It disadvantages me in that it makes me somewhat unmemorable, which is a disadvantage both at work and socially.
My husband has a traditional but unusual name and he is memorable because of it. A definite advantage (I suppose unless you're a spy or a criminal!)
We gave our children unusual names. I can report that based on my very small sample size, the absolute best name in terms of advantage is a name that is instantly recognisable as a name and consequently easy to spell, say and remember, but is unusual.
One of my kids has a very very unusual name and while she appreciates that it makes her known wherever she goes, she says it can be hard work explaining it. Another one of mine has an easy name with a tricky spelling (actually the correct, traditional spelling, not an Ehmilee or a Heaugaux), and she says it's tiresome explaining spelling and pronunciation to people. 3rd child has a very trad name that no one has ever met one of and he reports it's fab.